Sandy-E to Haswell-E i7's do not officially support 128gb, though there have been reports of it working.
Broadwell-E i7's now officially support 128gb.
All the Xeon equivalents (e5-1650/60,80, etc) support 256-768gb depending on the model, if paired with a consumer board that limit is usually 64-128gb.
Broadwell-E i7's now officially support 128gb.
All the Xeon equivalents (e5-1650/60,80, etc) support 256-768gb depending on the model, if paired with a consumer board that limit is usually 64-128gb.